Added file download capability. Doesn't work well.
Replaced dynamic download with static archive.
Polished UI features.

- Boxplot resizes when caption height changes.
- Can't try to sort by "Containing Genes" column.
- Removed console.log statements.
Added index on position on combined table.

- This is useful for sorting the table by position efficiently. Not that there
  is a reason to do so, really, but we do provide the possibility in the
  interface, so it should be efficient.
Check for variable being set in combined_feed.php.
Rearranged and cleaned up the javascript code.